Some linux/posix optimizations

Author: DavidBalishyan

.gitignore

@@ -15,3 +15,5 @@ nob.old
 nob.exe
 nob.exe.old
 nob.obj
+
+plug.plist

src/platform.h

@@ -14,6 +14,7 @@ typedef void *(*Platform_Thread_Function)(void *arg);
 Platform_Mutex *platform_mutex_create(void);
 void platform_mutex_destroy(Platform_Mutex *mutex);
 void platform_mutex_lock(Platform_Mutex *mutex);
+bool platform_mutex_try_lock(Platform_Mutex *mutex);
 void platform_mutex_unlock(Platform_Mutex *mutex);
 
 Platform_Condition *platform_condition_create(void);

src/platform_posix.c

@@ -45,6 +45,11 @@ void platform_mutex_lock(Platform_Mutex *mutex)
     pthread_mutex_lock(&mutex->value);
 }
 
+bool platform_mutex_try_lock(Platform_Mutex *mutex)
+{
+    return pthread_mutex_trylock(&mutex->value) == 0;
+}
+
 void platform_mutex_unlock(Platform_Mutex *mutex)
 {
     pthread_mutex_unlock(&mutex->value);

src/platform_windows.c

@@ -45,6 +45,11 @@ void platform_mutex_lock(Platform_Mutex *mutex)
     EnterCriticalSection(&mutex->value);
 }
 
+bool platform_mutex_try_lock(Platform_Mutex *mutex)
+{
+    return TryEnterCriticalSection(&mutex->value) != 0;
+}
+
 void platform_mutex_unlock(Platform_Mutex *mutex)
 {
     LeaveCriticalSection(&mutex->value);